| 摘要 |
PURPOSE: An optical touch system is provided to increase the sensibility by extending a touch spot form on the basis of the X-Y- asymmetry curvature of the object lens. CONSTITUTION: A retroreflector(120) reflects the infrared ray emitted from an infrared LED(100). An infrared pass filter(130) enables the infrared ray reflected from the retroreflector to pass through. The object lens(140) concentrates the infrared ray passed through the infrared pass filter and have asymmetric curvature. A linear sensor(150) receives the infrared ray concentrated in the objected lens, and then detects a touch area between the infrared LED and the retroreflector. |
